<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>16-常见事件</title>
</head>

<body onload="load()">

    <form action="" style="text-align: center;" onsubmit="subfn()">
        <input type="text" name="username" onblur="bfn()" onfocus="ffn()" onkeydown="kfn()">
        
        <input id="b1" type="submit" value="提交">

        <input id="btn1" type="button" value="单击事件" onclick="fn1()">
    </form>  

    <br><br><br>

    <table width="800px" border="1" cellspacing="0" align="center" onmouseover="over()" onmouseout="out()">
        <tr>
            <th>学号</th>
            <th>姓名</th>
            <th>分数</th>
            <th>评语</th>
        </tr>
        <tr align="center">
            <td>001</td>
            <td>张三</td>
            <td>90</td>
            <td>很优秀</td>
        </tr>
        <tr align="center">
            <td>002</td>
            <td>李四</td>
            <td>92</td>
            <td>优秀</td>
        </tr>
    </table>

</body>

<script>
    //onload : 页面/元素加载完成后触发
    function load(){
        console.log("页面加载完成...")
    }

    //onclick: 鼠标点击事件
    function fn1(){
        console.log("我被点击了...");
    }

    //onblur: 失去焦点事件
    function bfn(){
        console.log("失去焦点...");
    }

    //onfocus: 元素获得焦点
    function ffn(){
        console.log("获得焦点...");
    }

    //onkeydown: 某个键盘的键被按下
    function kfn(){
        console.log("键盘被按下了...");
    }

    //onmouseover: 鼠标移动到元素之上
    function over(){
        console.log("鼠标移入了...")
    }

    //onmouseout: 鼠标移出某元素
    function out(){
        console.log("鼠标移出了...")
    }

    //onsubmit: 提交表单事件
    function subfn(){
        alert("表单被提交了...");
    }

</script>
</html>